package netty.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.udt.UdtChannel;
import io.netty.channel.udt.nio.NioUdtProvider;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.concurrent.DefaultThreadFactory;
import lombok.extern.slf4j.Slf4j;

import java.nio.charset.StandardCharsets;
import java.util.concurrent.TimeUnit;

@Slf4j
public class UdtBytesClient {
    static final String HOST = System.getProperty("host", "127.0.0.1");

    static final int PORT = Integer.parseInt(System.getProperty("port", "8009"));
    static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));

    public static void main(String[] args) throws Exception {

        final NioEventLoopGroup group = new NioEventLoopGroup(1, new DefaultThreadFactory("connect"), NioUdtProvider.BYTE_PROVIDER);
        try {
            Bootstrap b = new Bootstrap();
            b.group(group)
                    .channelFactory(NioUdtProvider.BYTE_CONNECTOR)
                    .handler(new ChannelInitializer<UdtChannel>() {
                        @Override
                        protected void initChannel(UdtChannel ch) throws Exception {
                            ChannelPipeline p = ch.pipeline();
                            p.addLast(new LoggingHandler(LogLevel.INFO));
                            p.addLast(new UdtBytesClientHandler());
                        }
                    });

            // Make the connection attempt.
            ChannelFuture f = b.connect(HOST, PORT).sync();
            Channel ch = f.channel();

            log.info("connect to {}:{}", HOST, PORT);
            for (int i = 0; i < 10; i++) {
                ch.eventLoop().schedule(() -> {
                    ch.writeAndFlush(Unpooled.wrappedBuffer(("hello udt" + System.currentTimeMillis()).getBytes(StandardCharsets.UTF_8)));
                }, i, TimeUnit.SECONDS);
            }

            // Wait until the connection is closed.
            ch.closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }
    }
}
